leo.c revision 1.15
1 /* $NetBSD: leo.c,v 1.15 2009/03/14 15:36:04 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 maximum entropy <entropy (at) zippy.bernstein.com> 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * Driver for the Circad Leonardo 1.2 from Lexicor, a 24-bit true color 32 * VME graphics card based on the Texas Instruments TMS34061. 33 * 34 * Written by maximum entropy <entropy (at) zippy.bernstein.com>, December 5, 1997. 35 * 36 * This driver was written from scratch, but I referred to several other 37 * drivers in the NetBSD distribution as examples. The file I referred to 38 * the most was /sys/arch/atari/vme/if_le_vme.c. Due credits: 39 * Copyright (c) 1997 Leo Weppelman. All rights reserved. 40 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * This code is derived from software contributed to Berkeley by 44 * Ralph Campbell and Rick Macklem. 45 * This product includes software developed by the University of 46 * California, Berkeley and its contributors. 47 */ 48 49 #include <sys/cdefs.h> 50 __KERNEL_RCSID(0, "$NetBSD: leo.c,v 1.15 2009/03/14 15:36:04 dsl Exp $"); 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/proc.h> 55 #include <sys/errno.h> 56 #include <sys/device.h> 57 #include <sys/conf.h> 58 #include <sys/ioctl.h> 59 #include <machine/cpu.h> 60 #include <machine/bus.h> 61 #include <machine/iomap.h> 62 #include <machine/scu.h> 63 #include <atari/vme/vmevar.h> 64 #include <atari/vme/leovar.h> 65 #include <atari/vme/leoioctl.h> 66 67 static struct leo_addresses { 68 u_long reg_addr; 69 u_int reg_size; 70 u_long mem_addr; 71 u_int mem_size; 72 } leostd[] = { 73 { 0xfed90000, 0x100, 0xfec00000, 0x100000 } 74 }; 75 76 #define NLEOSTD (sizeof(leostd) / sizeof(leostd[0])) 77 78 struct leo_softc { 79 struct device sc_dev; /* XXX what goes here? */ 80 bus_space_tag_t sc_iot; 81 bus_space_tag_t sc_memt; 82 bus_space_handle_t sc_ioh; 83 bus_space_handle_t sc_memh; 84 int sc_flags; 85 int sc_maddr; 86 u_int sc_msize; 87 }; 88 89 #define LEO_SC_FLAGS_INUSE 1 90 91 static int leo_match(struct device *, struct cfdata *, void *); 92 static void leo_attach(struct device *, struct device *, void *); 93 static int leo_probe(bus_space_tag_t *, bus_space_tag_t *, 94 bus_space_handle_t *, bus_space_handle_t *, 95 u_int, u_int); 96 static int leo_init(struct leo_softc *, int); 97 static int leo_scroll(struct leo_softc *, int); 98 99 CFATTACH_DECL(leo, sizeof(struct leo_softc), 100 leo_match, leo_attach, NULL, NULL); 101 102 extern struct cfdriver leo_cd; 103 104 dev_type_open(leoopen); 105 dev_type_close(leoclose); 106 dev_type_read(leomove); 107 dev_type_ioctl(leoioctl); 108 dev_type_mmap(leommap); 109 110 const struct cdevsw leo_cdevsw = { 111 leoopen, leoclose, leomove, leomove, leoioctl, 112 nostop, notty, nopoll, leommap, nokqfilter, 113 }; 114 115 static int 116 leo_match(struct device *parent, struct cfdata *cfp, void *aux) 117 { 118 struct vme_attach_args *va = aux; 119 int i; 120 bus_space_tag_t iot; 121 bus_space_tag_t memt; 122 bus_space_handle_t ioh; 123 bus_space_handle_t memh; 124 125 /* 126 * We are passed our configuration in the attachment arguments. 127 * The configuration information may be partially unspecified. 128 * For any unspecified configuration parameters, we fill in those 129 * parameters with data for a "standard" configuration. 130 * Once we have a fully specified configuration, we try to probe 131 * a card with that configuration. 132 * The Leonardo only has one configuration and it isn't likely 133 * to change, but this routine doesn't assume that's the case. 134 */ 135 iot = va->va_iot; 136 memt = va->va_memt; 137 for (i = 0; i < NLEOSTD; i++) { 138 struct leo_addresses *leo_ap = &leostd[i]; 139 int found = 0; 140 struct vme_attach_args vat = *va; 141 142 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 143 printf("leo_match: config error: no irq support\n"); 144 return 0; 145 } 146 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 147 vat.va_iobase = leo_ap->reg_addr; 148 if (vat.va_maddr == VMECF_MEM_DEFAULT) 149 vat.va_maddr = leo_ap->mem_addr; 150 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 151 vat.va_iosize = leo_ap->reg_size; 152 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 153 vat.va_msize = leo_ap->mem_size; 154 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 155 printf("leo_match: cannot map io area\n"); 156 return 0; 157 } 158 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 159 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 160 &memh)) { 161 bus_space_unmap(iot, ioh, vat.va_iosize); 162 printf("leo_match: cannot map memory area\n"); 163 return 0; 164 } 165 found = leo_probe(&iot, &memt, &ioh, &memh, 166 vat.va_iosize, vat.va_msize); 167 bus_space_unmap(iot, ioh, vat.va_iosize); 168 bus_space_unmap(memt, memh, vat.va_msize); 169 if (found) { 170 *va = vat; 171 return 1; 172 } 173 } 174 return 0; 175 } 176 177 static int 178 leo_probe(iot, memt, ioh, memh, iosize, msize) 179 bus_space_tag_t *iot, *memt; 180 bus_space_handle_t *ioh, *memh; 181 u_int iosize, msize; 182 { 183 184 /* Test that our highest register is within the io range. */ 185 if (0xca > iosize) /* XXX */ 186 return 0; 187 /* Test if we can peek each register. */ 188 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 189 return 0; 190 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 191 return 0; 192 /* 193 * Write a test pattern at the start and end of the memory region, 194 * and test if the pattern can be read back. If so, the region is 195 * backed by memory (i.e. the card is present). 196 * On the Leonardo, the first byte of each longword isn't backed by 197 * physical memory, so we only compare the three low-order bytes 198 * with the test pattern. 199 */ 200 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 201 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 202 return 0; 203 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 204 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 205 != 0xa5a5a5) 206 return 0; 207 return 1; 208 } 209 210 static void 211 leo_attach(parent, self, aux) 212 struct device *parent, *self; 213 void *aux; 214 { 215 struct leo_softc *sc = (struct leo_softc *)self; 216 struct vme_attach_args *va = aux; 217 bus_space_handle_t ioh; 218 bus_space_handle_t memh; 219 #ifndef SET_REGION 220 int i; 221 #endif 222 223 printf("\n"); 224 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 225 panic("leo_attach: cannot map io area"); 226 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 227 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 228 panic("leo_attach: cannot map memory area"); 229 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 230 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 231 #else 232 for (i = 0; i < (va->va_msize >> 2); i++) 233 bus_space_write_4(va->va_memt, memh, i << 2, 0); 234 #endif 235 sc->sc_iot = va->va_iot; 236 sc->sc_ioh = ioh; 237 sc->sc_memt = va->va_memt; 238 sc->sc_memh = memh; 239 sc->sc_flags = 0; 240 sc->sc_maddr = va->va_maddr; 241 sc->sc_msize = va->va_msize; 242 leo_init(sc, 512); 243 leo_scroll(sc, 0); 244 } 245 246 int 247 leoopen(dev_t dev, int flags, int devtype, struct proc *p) 248 { 249 struct leo_softc *sc; 250 int r; 251 252 sc = device_lookup_private(&leo_cd, minor(dev)); 253 if (!sc) 254 return ENXIO; 255 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 256 return EBUSY; 257 r = leo_init(sc, 512); 258 if (r != 0) 259 return r; 260 r = leo_scroll(sc, 0); 261 if (r != 0) 262 return r; 263 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 264 return 0; 265 } 266 267 static int 268 leo_init(struct leo_softc *sc, int ysize) 269 { 270 271 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 272 return EINVAL; 273 /* XXX */ 274 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 275 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 276 if (ysize == 384) 277 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 278 else 279 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 280 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 281 if (ysize == 384) 282 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 283 else 284 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 285 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 286 if (ysize == 384) 287 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 288 else 289 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 291 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 292 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 294 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 295 if (ysize == 256) { 296 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 297 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 299 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 300 } else if (ysize == 384) { 301 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 302 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 304 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 305 } else { 306 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 310 } 311 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 313 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 314 if (ysize == 384) 315 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 316 else 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 318 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 319 return 0; 320 } 321 322 static int 323 leo_scroll(struct leo_softc *sc, int scroll) 324 { 325 326 if ((scroll < 0) || (scroll > 255)) 327 return EINVAL; 328 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 329 (scroll >> 6) && 0xff); 330 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 331 (scroll << 2) && 0xff); 332 return 0; 333 } 334 335 int 336 leoclose(dev_t dev, int flags, int devtype, struct proc *p) 337 { 338 struct leo_softc *sc; 339 340 sc = device_lookup_private(&leo_cd, minor(dev)); 341 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 342 return 0; 343 } 344 345 #define SMALLBSIZE 32 346 347 int 348 leomove(dev_t dev, struct uio *uio, int flags) 349 { 350 struct leo_softc *sc; 351 int length, size, error; 352 u_int8_t smallbuf[SMALLBSIZE]; 353 off_t offset; 354 355 sc = device_lookup_private(&leo_cd,minor(dev)); 356 if (uio->uio_offset > sc->sc_msize) 357 return 0; 358 length = sc->sc_msize - uio->uio_offset; 359 if (length > uio->uio_resid) 360 length = uio->uio_resid; 361 while (length > 0) { 362 size = length; 363 if (size > SMALLBSIZE) 364 size = SMALLBSIZE; 365 length -= size; 366 offset = uio->uio_offset; 367 if (uio->uio_rw == UIO_READ) 368 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 369 offset, smallbuf, size); 370 if ((error = uiomove((void *)smallbuf, size, uio))) 371 return (error); 372 if (uio->uio_rw == UIO_WRITE) 373 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 374 offset, smallbuf, size); 375 } 376 return 0; 377 } 378 379 int 380 leoioctl(dev_t dev, u_long cmd, void *data, int flags, struct proc *p) 381 { 382 struct leo_softc *sc; 383 384 sc = device_lookup_private(&leo_cd,minor(dev)); 385 switch (cmd) { 386 case LIOCYRES: 387 return leo_init(sc, *(int *)data); 388 break; 389 case LIOCSCRL: 390 return leo_scroll(sc, *(int *)data); 391 break; 392 default: 393 return EINVAL; 394 break; 395 } 396 } 397 398 paddr_t 399 leommap(dev_t dev, off_t offset, int prot) 400 { 401 struct leo_softc *sc; 402 403 sc = device_lookup_private(&leo_cd, minor(dev)); 404 if (offset >= 0 && offset < sc->sc_msize) 405 return m68k_btop(sc->sc_maddr + offset); 406 return -1; 407 } 408
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